Why I am obtaining this error messages when I run my Laravel project after having retrieve it from GIT? Controllers can't works?

I am pretty new in Laravel and I have the following problem.

I was working on a Laravel 5 application on my old notebook putting my code on my GIT repository. Then I change laptop and I do the checkout of my Laravel 5 project from GIT.

Then I perform this statment to reimport my dependency:

composer install

Now my problem is that I can't access to the developed section of my Laravel website.

For example I have this controller class:

class RegistrationController extends Controller {

    public function index(){
        Log::info('index() START');
        return view('/registration/index');

    }

    ..................................................................
    ..................................................................
    ..................................................................
}

The index() method render the resources/views/registration/index.blade.php view.

The problem is that trying to open the URL http://laravel.dev/registration I obtain the following Laravel error message:

Whoops, looks like something went wrong.
Whoops, looks like something went wrong.

Also if I try to access to the http://laravel.dev/ base URL I am obtaining the same error messages.

where laravel.dev is a virtual host declared in this way into my C:\xampp\apache\conf\extra\httpd-vhosts.conf file:

<VirtualHost *:80>
    DocumentRoot "C:/xampp/htdocs"
    ServerName dummy-host2.example.com
</VirtualHost>

<VirtualHost *:80>
    DocumentRoot "C:/xampp/htdocs/HotelRegistration/public"
    ServerName laravel.dev
</VirtualHost>

Where C:/xampp/htdocs is where all my projects are deployed in Apache and C:/xampp/htdocs/HotelRegistration/public is the public folder of my Laravel 5 project.

Performing the php artisan route:list statment I obtain the list of all my routes:

C:\xampp\htdocs\HotelRegistration>php artisan route:list
+--------+-----------+----------------------------------+----------------------+-----------------------------------------------------+--------------+
| Domain | Method    | URI                              | Name                 | Action                                              | Middleware   |
+--------+-----------+----------------------------------+----------------------+-----------------------------------------------------+--------------+
|        | GET|HEAD  | /                                |                      | Closure                                             | web          |
|        | GET|HEAD  | api/user                         |                      | Closure                                             | api,auth:api |
|        | GET|HEAD  | contact                          |                      | Closure                                             | web          |
|        | POST      | contact                          |                      | App\Http\Controllers\EnquiryController@index        | web          |
|        | GET|HEAD  | registration                     | registration.index   | App\Http\Controllers\RegistrationController@index   | web          |
|        | POST      | registration                     | registration.store   | App\Http\Controllers\RegistrationController@store   | web          |
|        | GET|HEAD  | registration/create              | registration.create  | App\Http\Controllers\RegistrationController@create  | web          |
|        | GET|HEAD  | registration/{registration}      | registration.show    | App\Http\Controllers\RegistrationController@show    | web          |
|        | PUT|PATCH | registration/{registration}      | registration.update  | App\Http\Controllers\RegistrationController@update  | web          |
|        | DELETE    | registration/{registration}      | registration.destroy | App\Http\Controllers\RegistrationController@destroy | web          |
|        | GET|HEAD  | registration/{registration}/edit | registration.edit    | App\Http\Controllers\RegistrationController@edit    | web          |
+--------+-----------+----------------------------------+----------------------+-----------------------------------------------------+--------------+

that contains:

|        | GET|HEAD  | registration                     | registration.index   | App\Http\Controllers\RegistrationController@index   | web          |

So it seems that the registration resource is correctly associated to the previous controller method.

So why am I experiencing this issue? What is the problem? What am I missing? How can I fix this issue?

EDIT-1: going into the laravel.log file I found this error message:

[2017-03-08 09:31:37] production.ERROR: RuntimeException: The only supported ciphers are AES-128-CBC and AES-256-CBC with the correct key lengths. in C:\xampp\htdocs\HotelRegistration\vendor\laravel\framework\src\Illuminate\Encryption\Encrypter.php:43
Stack trace:
#0 C:\xampp\htdocs\HotelRegistration\vendor\laravel\framework\src\Illuminate\Encryption\EncryptionServiceProvider.php(27): Illuminate\Encryption\Encrypter->__construct('', 'AES-256-CBC')
#1 C:\xampp\htdocs\HotelRegistration\vendor\laravel\framework\src\Illuminate\Container\Container.php(678): Illuminate\Encryption\EncryptionServiceProvider->Illuminate\Encryption\{closure}(Object(Illuminate\Foundation\Application))
#2 C:\xampp\htdocs\HotelRegistration\vendor\laravel\framework\src\Illuminate\Container\Container.php(565): Illuminate\Container\Container->build(Object(Closure))
#3 C:\xampp\htdocs\HotelRegistration\vendor\laravel\framework\src\Illuminate\Foundation\Application.php(702): Illuminate\Container\Container->make('encrypter')
.............................................................................
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So the problem could depend by the fact that I have no more my .env file (because it seems that GIT ignore it)?

via blablabla blablabla